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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-367DATA-CHL (Network Control Data Channel)
10
Data Channel Crosstalk Test (#110)
This test verifies the integrity of the entire DATA-CHL, that is, the software, dual
port RAM, and hardware that composes it. However, unlike the Remote
Maintenance Loop Around Test (#109), this test only involves the single
DATA-CHL that is the target of the test. A loop around connection is established
over the TDM Bus from the DATA-CHL back to itself. Data is looped over the
connection in each direction, that is, the DATA-CHL is tested as both a sender of
data and a receiver of data. The test checks that the data received by the
DATA-CHL is the same as the data that was sent by the DATA-CHL.
Because it establishes a loop around connection from the Network Control
DATA-CHL back to itself across the TDM Bus, this test does more than just verify
the integrity of the target DATA-CHL. It also verifies the integrity of the
DATA-CON (by establishing the connection) and of the TDM Bus and
Tone-Clock circuit pack (by sending and receiving data).
If this test aborts or fails, it is impossible to determine from this test alone whether
the target DATA-CHL is defective or if the problem lies with the DATA-CON, TDM
Bus, or Tone-Clock circuit pack. The results of running Tests #107, #108, and
#111 on the DATA-CHL can be used to determine whether the target DATA-CHL
is defective.
Finally, recall from the description of that DATA-CHLs 1 and 2 share a common
DPR and TDM Bus interface hardware and DATA-CHLs 3 and 4 share a common
DPR and TDM Bus interface hardware. Thus, if this test finds that DATA-CHL 1 is
defective, then DATA-CHL 2 is likely to be defective and vice versa. Similarly, if
this test finds that DATA-CHL 3 is defective, then DATA-CHL 4 is likely to be
defective and vice versa.
NOTE:
If an Error Code is encountered that recommends that an CDR Link, System
Printer Link, PMS Log Printer, Wakeup-Log Printer Link, and/or PMS Link be
busied out, restore each busied-out link to service according to the
PRI-CDR/SEC-CDR (PRI-CDR Link), SYS-PRNT, or PMS-LINK Maintenance
documentation, respectively, before concluding work on the problem.
PASS The target DATA-CHL, DATA-CON, TN777 Network Control circuit pack,
TDM Bus (TDM-BUS), and Tone-Clock circuit pack (TONE-BD, TONE-PT,
TDM-CLK) are functioning. Connections can be established over the
DATA-CHLs.
Table 10-117. TEST #109 Data Channel Remote Maintenance Loop Around Test — Continued
Error
Code
Test
Result Description/Recommendation
Continued on next page